import pytest
import requests
import json
from typing import Dict, Any, Optional
import time
from unittest.mock import patch
import requests_mock

# 配置信息（全部使用模拟值）
CONFIG = {
    "secret_id": "mock-secret-id",
    "secret_key": "mock-secret-key",
    "region": "ap-guangzhou",
    "api_url": "https://cvm.tencentcloudapi.com/",
}


def generate_signature(params: Dict[str, Any]) -> str:
    """生成API请求签名（模拟实现）"""
    return "mock-signature"


def describe_placement_group_quota() -> Dict[str, Any]:
    """查询置放群组配额"""
    params = {
        "Action": "DescribePlacementGroupQuota",
        "Version": "2017-03-12",
        "Region": CONFIG["region"],
        "SecretId": CONFIG["secret_id"],
        "Timestamp": int(time.time()),
        "Nonce": int(time.time() * 1000),
    }

    params["Signature"] = generate_signature(params)
    response = requests.post(CONFIG["api_url"], data=params)
    return response.json()


# 测试用例
class TestTencentCloudPlacementGroupQuota:
    @pytest.fixture
    def mock_request(self):
        with requests_mock.Mocker() as m:
            yield m

    def test_success(self, mock_request):
        """测试成功查询配额"""
        mock_response = {
            "Response": {
                "QuotaSet": [
                    {
                        "Type": "HOST",
                        "Quota": 20,
                        "Used": 5,
                        "CvmQuotaTotal": 100
                    },
                    {
                        "Type": "SW",
                        "Quota": 10,
                        "Used": 2,
                        "CvmQuotaTotal": 50
                    }
                ],
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = describe_placement_group_quota()
        assert "Response" in result
        assert "Error" not in result["Response"]
        assert "QuotaSet" in result["Response"]
        assert len(result["Response"]["QuotaSet"]) > 0

    def test_invalid_action(self, mock_request):
        """测试无效Action"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidAction",
                    "Message": "The specified action does not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改函数内的Action参数
        original_code = describe_placement_group_quota.__code__
        new_code = original_code.replace(
            co_consts=tuple(
                'InvalidAction' if const == 'DescribePlacementGroupQuota' else const
                for const in original_code.co_consts
            )
        )

        try:
            describe_placement_group_quota.__code__ = new_code
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "InvalidAction"
        finally:
            # 恢复原始函数
            describe_placement_group_quota.__code__ = original_code

    def test_invalid_version(self, mock_request):
        """测试无效Version"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "UnsupportedVersion",
                    "Message": "The specified version does not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改函数内的Version参数
        original_code = describe_placement_group_quota.__code__
        new_code = original_code.replace(
            co_consts=tuple(
                'invalid-version' if const == '2017-03-12' else const
                for const in original_code.co_consts
            )
        )

        try:
            describe_placement_group_quota.__code__ = new_code
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "UnsupportedVersion"
        finally:
            # 恢复原始函数
            describe_placement_group_quota.__code__ = original_code

    def test_invalid_region(self, mock_request):
        """测试无效Region"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameterValue.RegionNotFound",
                    "Message": "The specified region does not exist."
                },
                "RequestId": "mock-request-id"
            }
        }

        original_region = CONFIG["region"]
        CONFIG["region"] = "invalid-region"

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "InvalidParameterValue.RegionNotFound"
        finally:
            CONFIG["region"] = original_region

    def test_auth_failure(self, mock_request):
        """测试认证失败"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "AuthFailure.SignatureFailure",
                    "Message": "The provided signature is invalid."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改签名生成函数
        with patch('__main__.generate_signature', return_value='invalid-signature'):
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "AuthFailure.SignatureFailure"

    def test_insufficient_permissions(self, mock_request):
        """测试权限不足"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "AuthFailure.UnauthorizedOperation",
                    "Message": "You are not authorized to perform this operation."
                },
                "RequestId": "mock-request-id"
            }
        }

        original_secret_id = CONFIG["secret_id"]
        CONFIG["secret_id"] = "invalid-secret-id"

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "AuthFailure.UnauthorizedOperation"
        finally:
            CONFIG["secret_id"] = original_secret_id

    def test_missing_required_parameter(self, mock_request, describe_placement_group_quota=None):
        """测试缺少必要参数"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InvalidParameter",
                    "Message": "A required parameter is missing."
                },
                "RequestId": "mock-request-id"
            }
        }

        # 修改函数内部行为，移除必要参数
        original_function = describe_placement_group_quota

        def mock_function():
            params = {
                "Action": "DescribePlacementGroupQuota",
                "Version": "2017-03-12",
                # 缺少Region参数
                "SecretId": CONFIG["secret_id"],
                "Timestamp": int(time.time()),
                "Nonce": int(time.time() * 1000),
            }
            params["Signature"] = generate_signature(params)
            response = requests.post(CONFIG["api_url"], data=params)
            return response.json()

        describe_placement_group_quota = mock_function

        try:
            mock_request.post(CONFIG["api_url"], json=mock_response)
            result = describe_placement_group_quota()
            assert "Response" in result
            assert "Error" in result["Response"]
            assert result["Response"]["Error"]["Code"] == "InvalidParameter"
        finally:
            describe_placement_group_quota = original_function

    def test_internal_error(self, mock_request):
        """测试内部错误"""
        mock_response = {
            "Response": {
                "Error": {
                    "Code": "InternalServerError",
                    "Message": "An internal server error occurred."
                },
                "RequestId": "mock-request-id"
            }
        }

        mock_request.post(CONFIG["api_url"], json=mock_response)

        result = describe_placement_group_quota()
        assert "Response" in result
        assert "Error" in result["Response"]
        assert result["Response"]["Error"]["Code"] == "InternalServerError"


def run_tests():
    """启动测试的函数"""
    # 打印配置信息用于调试
    print("测试配置信息:")
    for key, value in CONFIG.items():
        print(f"{key}: {value if key != 'secret_key' else '****'}")

    # 运行所有测试
    pytest.main([__file__, "-v"])


if __name__ == "__main__":
    run_tests()    